Total control means for adding machines



Sept. 9, 1941. w. w. LANDSIEDEL 5 5 TOTAL CONTROL MEANS FOR ADDING MACHINES Filed Nov. 25, 1936 5 Sheets-Sheet 1 INVENTO WALTER W. LANDSIE L BY {LL Aim ATTORNEY Sept. 9, 1941. w. W LANDSIEDEL TOTAL CONTROL MEANS FOR ADDING MACHINES Filed Nov. 25, 1936 5 Sheets-Sheet 2 mvsuroa WALTER W. LANDSIEDEL BY j/L Z. ATTORN-EY Sept. 9, 1941. w. w. LANDSIEDEL TOTAL CONTROL MEANS FOR ADDING MACHINES Filed Nov. 25, 1956 5 Sheets-Sheet 3 INVENTOR WALTER w LANDSEDEL HIS A TORNEY Sept. 9, 1941. w. w. LANDSIEDEL I TOTAL CONTROL MEANS FOR ADDING MACHINES Filed NOV. 25, 1936 5 Sheets-Sheet 4 m T N E V m WALTER w. LANDSIEDEL BY M HIS ATTORNEY p 1941- w. w. LANDSIEDEL 2,255,621

TOTAL CONTROL MEANS FOR ADDING MACHINES Filed Nov. 25, 1936 5 Sheet-Sheet 5 INVENTOR WALTER W. LANDS! EDEL ATTOR Patented Sept. 9, 1941 UNITED STATES PATENT TOTAL @ONTROL MEANS FGR ADDENG MACHINES Walter 9'. Landsiedel, N. EL, Remington Rand hoe Emir-ale, N. K, a cor tion of Delaware 3 Clams.

been the subject of a line of patents beginning with that to Hopkins, No. 1,939,130, September 24, 1912. Patent 1,649,478 to W. W. Landsiedel, November 15, 1927, describes a machine in which accumulators, one of which was capable oi yield= ing true negative totals, were added at the rear of the machine; Patent No. 2,0435%, to Dreher, describes certain improvements on I Landsiedel machine; and Patent No. Zilllfifiil, to B. Dysart, describes further improvements on the Dreher machine. The Dalton machine as manufactured for a number of years has been of the general type described in the Dysart patent, but with a number of modifications and improve ments.

The present invention has for principal object to facilitate the operation of the machine for bookkeeping purposes, and particularly with respect to the taking. of totals, both automati cally under control of the paper carriage and manually by the operation of certain finger pieces. Heretofore the machine has been set for total taking by pushing in a total key which had a rather long stroke and ofiered an appreciable resistance and which was, therefore, not well adapted to be operated by a cam on the paper carriage. According to the present invention, the total-control mechanism is operated by a spring which is energized by the main operating mechanism, and is brought into action by merely trip" ping a restraining latch and this construction is so combined with a carriage cam and with manual setting devices and safety locks as that the whole construction affords a convenient and efficient and improved operation of the machine for bookkeeping work. e

Other objects and structural details of the invention will be apparent from the following description when read in connection with the accompanying drawings wherein:

Figs. 1 and 1A together constitute a fragmentary isometric view showing only the parts of the invention and enough cooperating parts to give a general understanding of how the invention operates.

Fig. 2 is a detail isometric showing the blank stroke lock of the Dalton adding machine.

rlo.

front and r ar accumulators the oper ailing shaft.

Fig. 1 is left hand tional elevation taken just ide hand me showing the wipe operating trol' lever and associated parts, part mechanism, section of the carriage, the total can". the manual release lever, and J. linkage from the total earn to the total shart lat-ch.

Fig. 5 is entary view c Fig. i but on er scale than a,

Fig. 6 is a fragmentary view or a net-all of l but view roin the right;

Fig. 7 is a the mechanism shown in c g the right and having added thereto certain con trol devices copied from to W. W. Landsiedel, No. 1,649,4'38, ber 15, rear.

Front and rear accumulators As will be seen from Figs. l, 3, and l, the main operating i (rocked by a handle not shown) holds a main cans 2 (Fig. l) which is made with a full stroke sector 3 on its rear arm and a curve 4 on its front arm. This curve d supports a roller 5 carried by the rearwardly extending 6 of a bell crank l. lhe bell crank-l is last on the usual total shaft t of the Dalton adding machine and has an uprightarm 3 with an ofiset ear id to which is fastened a spring ii anchored at its rear end to a pin it which is last to the inner side of the right main frame (not shown) of the machine. The total shaft 8 is normally locked against rearward movement by which will be later described. The main shaft 5 is rocked forward and back once for every mach ne operation and, during any but a total cycle, the curve I on main cam 2 moves forward downward without operating the total shaft 3 through roller 5. If, however, the machine has been properly cond1tioned for a total, then, on the total cycle, the total shaft 8 will be unlocked and spring H will draw bell crank 1 clockwise as seen in Fig. 1 so that the roller 5 will be pressed snugly against the curve 4, and when the main shaft I is drawn counter-clockwise by the operating handle, the spring II will be allowed to draw the bell crank I clockwise and thus rock the total shaft 8.

dated Novemrelease 3i of the patent The front accumulator wheels I3 (Fig. 3) are turned by the usual rack sectors I4 as is old and well known in the art. The wheels I 3 are thrown into and out of engagement with the rack sectors by a cam I5 fast to the end of a rock shaft I6. The cam I5 is held in its various positions by a spring pressed detent member I1 bearing a roller I3 which engages one or another of the notches I3 in the cam I5. As will be seen from Fig. 4, the cam I5 is rotated with its rock shaft I6 by a wipe pawl 26 and pin plate assembly 2i, 22, 23 similar to the one shown in Figs. 1 and 3 for moving the rear accumulator pinions. Since this arrangement is old in Dalton machines, and since it has been well described and shown in Dysart 2,014,560, it is thought that a .brief description of these parts is all that is necessary and this will be given now.

Referring specifically to Figs. 1 and 3, it will be seen that a plate 24 is made fast to the main shaft I and has, protruding from its left hand side, a stud (Fig. 3) which pivots the front end of a split or extensible link 26. The rear end of link 26 is pivoted to an arm 21 which is fastto the left hand end of a sleeve 23 (Fig. 1)

at the right hand end of which is fastened an arm 29 carrying at itsrear end a wipe pawl 33. This wipe pawl is adapted to engageone or another of the pins 3i and 32 which are held on the pin plate 33. The front accumulator consists of one set of pinions and is an adding accumulator only, whereas the rear accumulator is an algebraic accumulator such as is shown and described in the Patent 2,014,560 to Dysart. In regular addition and subtraction operations, the pinions of the rear accumulators are thrown into and out of mesh with their respective racks by means of the wipe pawl 36 as has previously been described in a general way and which will be hereinafter explained.

its sleeve 23.

now be described in detail. On the forward stroke of the operating handle, the main operating shaft i and hence, the plate 24 are swung counterclockwise. This pulls forward the link 26 and thus swings arm 29 counterclockwise with As the: arm 25 moves counterclockwise, the wipe pawl 36, attached thereto, is drawn by its spring 30A against the pin 31 and as the pawl continues its movement it pushes the pin and pin plate 33 counterclockwise about the shaft 34. A pin 35 which extends leftwardly from the pin plate 33 (as viewed from the front of the machine) is held in a slot 36 in a total plate 31 which forms one part of the pin plate assembly. This total plate 31 is made with three slots 35, 38 and 39 as shown in Fig. 3 and holds a rightwardly extending stud 40 at its top which will be more fully described hereinafter. The slot 36, as has been previously mentioned, holds the stud 35 set in the pin plate 33, the slot 33 contains the shaft 34 and is merely to allow sliding movement of the total plate 31 during totaling operations and the slot 39 contains a pin 4| which protrudes rightwardly from a cam plate (as viewed in Fig. l) 42 now to be described. The pin 4| and the shaft 34, in conjunction with the slots 39 and 38 respectively, guide the total plate 31 in its sliding movements as will which is fast upon the right hand end of the shaft 34 is formed with an upper cam surface consisting of a depressed portion 43 and two raised portions 44 and 45 as is clearly shown in Fig. 3. A spring'46, shown in Figs. 1 and 3, is anchored at its upper end to an ear 41, formed integral with the cam plate 42, and at its lower The cam plate 42 end to an ear 48 formed integral with the total plate 31. This spring 46 tends constantly to,

draw the total plate 31 to its uppermost position where it is limited by the pin 4 I From the foregoing it will be seen that, as the main operatlng shaft I is given its forward stroke, the wipe pawl 30 on any adding cycle, contacting pin 3 I will move the pin plate 33, the total plate 31 and the cam plate 42 counterclockwise as a unit about the shaft 34. On the return stroke, the wipe pawl will contact the pin 32 and restore the above mentioned parts to normal position which is that shown in Figs. 1 and 3.

Referring particularly to Fig. 3, the rear accumulator pinions 49 are held by a pair of bail arms 50, the right hand bail arm (as viewed from the front of the machine) being the only one shown in Fig. 3. This bail arm 53 has the form of a bell crank and the forwardly extending arm 5I carries a roller 52 which is pressed by a spring 53, (Fig. 4) on the left hand bail arm 50, against the cam 42 (Fig. 3). It will thus be seen that on the forward stroke of any adding cycle, the accumulators will be thrown out of mesh by the rotation of cam plate 42 and that they will be thrown into mesh at the beginning of the return stroke by this same means. Subtraction is accomplished on this machine by the exact method taught by Dysart in his Patent 2,014,560, and as it has no direct bearing upon the present invention, it is not thought necessary to describe it in full here. Sufiice it to say that when the subtract key 54 (Fig. 1) is depressed, it pulls forward the subtraction link 55 which, by a pin and slot connection, pulls the plate 56 forward and hence pulls forward the car 51 which is formed integral therewith. A raising member 53 is formed with two opposite cars 59, the front one being shown in Fig. 1. A link 60, shown broken in Fig, 1, connects the arms 29 with an actuating member 6!, said actuating member 6| having an upwardly extending finger 62 which engages the forward ear 59 on the raising member 53 at each forward stroke of the main operating shaft I. When depression of the subtract key 54 pulls the plate 56 forward, the ear 51 thereon then overlies the rearwardly extending ear 59 of the raising member 58, and if the member 58 is now swung counterclockwise by the link 66 and the actuating member 6|, it will be seen that the plate 56 will be raised. The plate 53 is attached by pin and slot connections to a plate 63 which (as seen in Fig. 1) is formed with an upwardly extending branch 54, a downwardly extending branch 55 and a rearwardly extending portion 66. The downwardly extending portion 65 is formed as shown with notches in its front. A spring pressed detent member 61 is pivoted at 58 and carries a roll or stud 69 at its top which engages one or another of the notches cut in the front of branch 65 to hold the entire plate 63 in either its upward or downward position. From the foregoing, it will be seen that, when the subtract key 54 is depressed and the machine is then operated, the plate 56 will be raised and that this will, in turn, raise plate 63. When the subtract key'is released, the plate 56 is moved rearward and the V upright finger 56A thereon is positioned in the I plates 56 and 63 to adding position. The upper branch 64 of the plate 63 is offset and is in constant contact with the right hand end of a U- shaped cross vher 18 which is supported and guided for lateral movement in the inner machine frames as shown. An ear 1| is bent of! from the cross bar 18 and carries one end of a spring 12, the other end of which is anchored to the right hand inner frame plate. The U-shaped cross bar 18 has a rearwardly projecting finger 13 near its left end which engages at its rear a forked member 14. Thus, it will be apparent that upon depression of the subtract key 54 and operation of the machine, the plate 63 will be raised and the branch 64 thereof will push the cross bar 18 to the left (as seen in Fig. 1) and that this will move the finger 18 and the member 14 to the left. The fugitive one mechanism controlled by the notched member 14, is clearly shown and explained by Dysart (above) and, since it forms no part of the present invention, will not be described here. The rearwardly extending branch 66 of the plate 63 is bent off to the right as shown in Fig. 1 and has a cam slot (not visible) in which rests a roller 15 mounted for rotation upon an arm 16 which is loosely mounted upon a shaft 11. Two arms 18 made fast to the shaft 11 are yieldingly connected to the above mentioned arm 18 through a. spring carrying device 18. The arms 18 and arm 16 constitute a lever of the first order. The yielding or spring carrying device 18 is used in the present instance to prevent breakage in the event that the shaft 11 should become jammed, but this is no part of the present invention. The bottom end of arm 18 lies between two collars 88 and 8| which are fastened to the right hand end of a shaft 82 which supports the rear accumulator pinions 48 and which is mounted for lateral movement in the inner side frame plates of the machine. The cam slot in the rearwardly extending branch 66 of the plate 63 is so formed that, when the plate 631s raised, it moves the roller 15 and hence, the arm 16 a small distance counterclockwise (as viewed from the front of the machine) and this moves the arm 18 counterclockwise to shift the rear accumulator pinions 48 (Fig. 3) out of mesh with their respective adding racks and into mesh with their respective subtracting. pinions. The adding racks and subtracting pinions are not shown herein since they form no part of the present invention but are designated by the reference numerals and I8 respectively in Fig. 4 of Dysart 2,014,560. When the subtract key 54 is released, the pinions 48 are returned to normal or adding position by the above mechanism just described.

Total link and blank stroke lock Upon the total shaft 8, (Fig. 1) is an arm 83 mounted for rotation therewith which is pinned at its top to a total link 84, the rear end of which is supported for forward and rearward sliding movement in a slot 85 cut in a supporting plate 86 secured to the base (not shown) of the machine. When the total shaft 8, during the taking of totals, is permitted to rock clockwise, as viewed from the right hand side of the machine, the total link 84 will move toward the rear of the machine and by the upper arm 81 thereof will move the link 88 rearward in a manner well known in the art. The rearward movement of link 88, through its headed stud 88, will move the arm 88, fast to a sleeve 8I loosely mounted upon a rockshaft 8 IA, in a clockwise direction as viewed from the right hand side of the machine. Consequently, a bell crank 82 (fixed upon the sleeve 8|) having a stud 88 at the'end of its upper arm will be moved an equal number of degrees in the same direction. A link 84 is pivoted at its upper end to the stud 88 and at its lower end to the upper arm of a bell crank 88. The rearwardly projecting arm 81 of the bell crank 88 overlies the stud or roll 48 on the total plate 31, hereinbefore described and it will, therefore, be evident that, whenever the total link moves rearward and moves the link 88 rearward, the total plat 31 will be depressed. The depression of total plate 31, through its slot 88 (Fig. 3) acting on the pin 35 on pin plate 33, will swing the pin plate 83 to such a position that the wipe pawl will not contact the pin -3I on its forward stroke and, hence, totaling will ensue in the usual manner taught in Patent 2,014,560 to Dysart. Totaling is accomplished in the same manner in the front totalizer.

Referring specifically to Figs. 1 and 2, it will be seen that Fig. 2 is a complete showing of the blank stroke lock which is fully described in the Dysart patent and is merely for the purpose of enforcing a blank cycle of the machine before any total cycle can be accomplished. It is, therefore, thought only necessary to describe the various methods for operating this blank stroke lock and this description will now follow. As can be seen in Fig. 1, the subtraction link 55 carries a pin 88, near its rear end, which engages in a slot in an arm 88 fast upon the right hand end of a shaft I 88 which is shown broken away at its middle in Fig. 1. The left hand end of shaft I88,

- which is journaled in the inner side frames, carries a depending arm I8I which has a headed lower end I82 which is formed with two cam faces I83 and I84 adapted to act upon a stud I85 fast upon a rocking pawl I88 pivoted at I81 to the left inner machine frame. It will be seen that whenever the pawl I86 is moved a slight distance clockwise as viewed in Fig. 2, the tail of this pawl will engage the upright I88 on the blank stroke lock and will operate the lock to enforce a blank stroke before a total stroke. From the foregoing, it will be apparent that, whenever the subtract key 54 is depressed, the subtraction link 55 will, through its pin 98, pull the arm 83, shaft I88 and arm I8I clockwise as viewed from the right of the-machine and that the cam face I84 on head I82 of arm IIII will cam down the stud I85 and operate the blank stroke lock. It will also be seen that, when the subtraction key 54 is released, the above mentioned parts will be returned to normal and that, during this process, the cam face I83 will again cam down the stud I85.

A shaft I88, the left side of which i shown in Figs. 1 and 4, runs across the front of the machine and is journaled in the outer main frames (not shown). Loosely mounted upon the left hand end of shaft I88 is a bail shaped piece II8, the right hand arm I I l of which carries a pin I I2 which protrudes through a slot I I3 in a link II4. This link II4, as will be seen in Figs. 4 and 5, is

pivoted at its rear end to a rocking bail H5, the,

right hand bail arm of which (as viewed from thefront of the machine) is merely to forma bearing and the left hand bail arm of which is divided into an upper arm H5 and a lower arm or tail H1. The entire bail is fast to the rock shaft 8IA (Figs. 1 and 4) and it is at the approximate middle of the upper arm II6 that the link 4 is pivoted.

With the control lever I48 in its normal middle position, totals accumulated on the rear totalizer, when printed, are added into the front totalizer, on which a grand total is thus accumulated.

When, following some one of these totals, it is desired to print the grand total, said lever is pushed to its rear position. At this time, the last operation was a total taking operation on the rear totalizer, and the blank stroke lock is unlocked: but it was an adding operation on the front totalizer, and a blank stroke is, therefore, needed before taking the grand total. Means are, therefore, provided whereby such settklg of lever I40 operates the blank stroke look. When the lever I40 is drawn to its forward position, the total is still taken from the rear totalizer, and there is no occasion to operate the lock.

Riveted by two studs II8 to the lower arm H1 is a short offset finger I I9 which carries at its forward end a stud I20 (Figs. 1 and 4) which is adapted to engage the forward nose of the rocking pawl I 06. It will, thus, be evident that when the link I I4 is moved toward the front of the machine, .the bail II5 will be rocked and the finger II9 will swing the stud I causing stud I20 to cam up the forward nose of the rocking pawl I06 and thus cause the tail of this pawl to actuate the blank stroke lock (Fig. 2). that the return of the link II4 to normal position will bring the stud I20 forward from behind the nose on the rocking pawl I06 and again trip the blank stroke lock.

Total control lever Fast upon the left hand end of the total shaft 8 (Figs. 1 and 4) is an upright arm I2I having at its upper end an ear I2IA bent oil to the left as seen from the front of the machine. A spring pressed latch I22 is pivoted upon a cross shaft I23 and consists of three arms I24, I25 and I26. The rearward arm I26 protrudes through a slot I21 in a link I28 and the entire latch I22 is tensioned clockwise as seen from the left hand side of the machine, by a spring I29 (Fig. 4) anchored at one end to a stud I30 fast on the arm I26 of latch I22 and anchored at its other end to a portion of the machine frame (not shown). The forward arm I25 of latch I 22 is formed with a notched nose I3I and has a lug I32 bent off to the left as seen in Fig. l and adapted to be engaged by a manually operated lever I33 which is pivoted to the left hand outer frame of the machine. The notched nose I3I of arm I25 normally lies as is shown in Fig. 1 so that it blocks the ear I2IA and, hence, the lever I2I against any rotation which would be counterclockwise as seen from the left hand side of the machine. The downwardly projecting arm I24 of the latch I22 is a. very short arm and pivots the rear end of a link I34 by a pin and slot connection I35. The front end of link I34 is pivoted at I36 to the left hand bail arm I IOA of the bail H0 and at this same point is pivoted, near its midpoint, a link I38. The lower end of this link I 38 is pivoted at I39 to a total control lever I40 which is :manually movable to an upper and a lower position as shown and which is maintained normally in a central position by spring means, not shown. Before summation, it is to be understood that no total of any sort can be taken from either the front or the rear accumulator unless the main total link 84 moves to its rear or totaling position and it is also to be understood that no total can be taken without a previous blank stroke. It will be seen from the previous description that when the total control lever I40 is moved to its lowermost position, the link I38 will rockbail IIO counterclockwise as viewed from the left hand side of the machine and that this will pull for- It will also be evident ward the link I34 which, in turn, will rotate the .latch I22 far enough in a counterclockwise direction, as viewed from the left hand side of the, machine, to raise the nose I3I off the arm I2I and to thus allow'the spring II, bell crank 1, and

cam 2 to move the total link rearward on a totaling operation. It will further be understood that, if the total control lever I40 is moved to its uppermost position, the link I38 will rock bail IIO clockwise as seen from the left hand side of the machine and that this will, through the .pin

II2, move the link II4 toward the front of the machine and thereby trip the blank strokelock. This particular method of tripping the blank stroke lock is used to enforce a blank stroke previous to taking a total from the front totalizer. It will also be seen that the upper end I31 of link I38 will move the nose I3I of lever I22 far enough counterclockwise (as viewed from the left hand side of the machine) to clear the ear I2 IA of arm I2I and that this will permit the total link 84 to move rearward and this position of the total control lever I40 is used when it is desired to extract totals from the front totalizer.

The swinging of the total shaft 8, resulting in a rearward movement of the total links 84 and 84A, sets the front and rear accumulating mechanisms selectively for the taking of totals, in substantially the same way as in the Landsiedel Patent 1,649,478, that is to say, the total setting fingers 320 and 91 are connected with said links by releasable hooks, and means are provided whereby, when the link In (like the link I2I of the patent) is in its normal rear position, the finger 91 is connected to the link 84a and finger 320 disconnected from link 84, and when said link H4 is drawn to its, forward position the finger 320 is connected up and the finger 91 disconnected. As far as the present invention is concerned, the details of this hook mechanism and its controls may be of any suitable sort, as said details form no part of the present invention. Figs. 4, 5, and 6 show the rear mechanism as it has been used in the Dalton manufactured machines for a num- 1 her of years, and in Fig. '1 the front mechanism has been copied from Fig. 31 of the Landsiedel patent.

The front mechanism shown in Fig. '1 includes a slide 340 lying against a face of the link 84 and having two studs 34I passing through longitudinal slots in said link. One of said studs is embraced up the upstanding arm of the total-setting piece 3I9, 320, so as to rock said piece to its active position by a rearward movement of the slide 340. The slide 340 is adapted to be operated by a hook 343 engaging a lug 344 of said slide, said hook being pivoted to the link 84 and urged to engaging positionby a spring 345. The hook 343 is normally held out of engagement by a stud 346 on an arm thereof, resting on one arm 341 of a lever whose other arm 348 is held down by a stud 350 on the link II4. Said arm 348 has its edge inclined at 35I so that, when the link I I4 is drawn frontward the lever 341, 348 and the hook 343 are rocked clockwise in Fig. 7 by the spring 345, bringing said hook into engagement with the lug 344. If now the total shaft 8 be rocked and the link 84 moved rearward, the slide 340 will move with it, rocking the finger 320 downward and setting the mechanism for a total from the front totalizer. If, however, the link 84 moves rearward when the link H4 is in the posit on shown in Fig. 7, the slide 340 will be held statlonary and no total will be taken from the front totalizer.

aaoaea In the rear total-setting mechanism shown in Figs. 1, 4, 5, and 6, the link 88, a rearward movement of which rocks the total-setting finger 8! as hereinbefore described is supported from the total link 84A by two studs 838 and 332 riveted into the piece 88 and lying in longitudinal slots "I and 333 in the link 84A. A hook 321, pivoted to the link 88 on the stud 338, is adapted to engage a lug 823 fast on the link 84A, as shown more clearly in Fig. 6, whereby a rearward movement of link 84A will be communicated to link 88 and a total will be taken from the rear totallzer, and said hook does so engage said lug when the link H4 is in its rear position which may be regarded as its normal position. Movement of link II4 to its forward position rocks (clockwise in Figs. 4 and 5) a lever H8, 8, III, as has been described hereinbefore. Arm II8 of this lever has a stud 325 embraced by an angled slot 328 in th hook 321, in such wise that when said arm is in its normal position shown, said stud holds the hook down in engagement, but when said arm is rocked clockwise, said stud passes into a downwardly inclined part of the slot and lifts the hook out of engagement with the lug 329, thus breaking the operative connection between the links NA-and 88, so that a rearward movement of the former is not communicated to the latter, and a total will not be taken from the rear accumulator. It will be recalled that this movement of the link I I4 renders operative the total-setting mechanism for the front totallzer. When the hook 821 is out of engagement, the link 88 is held in its inactive position by any suitable spring, such as the spring 331, tensioned between a part of the link 88 and an Mm 338 of the link 84A. Movement oi the parts by this spring may be limited by any suitable stop, the one shown in Fig. 1 consisting of a fixed stud limiting the upward movement of finger 81.

It may be remarked in passing that an upstanding branch of the link 88 carries the fingers 388 which, together with a certainpiece 358 constitute a lock which has been in use in the Dalton machine for a number of years and is described in the cited prior patents. This lock blocks rearward movement of the link 88 if the balance registered in the accumulator is positive and the computing mechanism is set for subtraction, and vice versa. When the total control lever is in its central position, totals from the rear accumulator) may only be permitted by either moving the manual release lever I33 rearward to move the latch I22 or by a total cam, mounted on the carriage, which will now be described.

Total cam With reference particularly to Fig. 4, a section of the paper carriage is designated by the reference numeral I4I. Fastened in either end, of the carriage frame, are three cross bar assemblies consisting each of two cam supporting bars I42 which run the full length of the paper carriage and which are welded or otherwise suitably fastened to a central strengthening bar I43. One cam I44 is mounted on each support bar I42 and each cam I44 is adjustable laterally so that it may be positioned anywhere along its bar I42 as is set forth in the Patent 1,649,478 to W. W. Landsiedel. As the present invention is only concerned with the total cam, which is the rightmost cam as seen in Fig. 4, this is the only one which will be described herein. An arm I45 is pivotally mounted upon the frame of the machine and overlies the bent off top end of the link I28. To

the rear side of arm I48 is fastened a stud or roll I48 which is adapted to be engaged by the total cam I44. As the paper carriage steps along, the total cam moves with it and at a predetermined time, depending upon the position at which the cam was set on its support bar I42, the total cam will depress the stud I48 and arm I45. This, in turn, will depress the link I28 which will depress the rear end of arm I28 on latch I 22 and will raise the nose I3I oiI the ear I2IA so that if, at this point, two successive handle strokes were taken, a total would be printed. Previous to this invention, if the machine operator inadvertently gave the operating handle two strokes (with the total key operated) a total would be printed regardless of the position of the paper carriage but with the present latching arrangement, if neither manual release lever I33 or I40 is moved, a total can be printed only at that place in the position of the paper carriage where the total cam I44 depresses the link I28. The total control lever I48 (Figs. 1 and 4) was previously used in this machine to control the operations of the front and rear accumulators by linkage and other mechanism not shown or described herein. When the total control lever I48 is in its lowermost position,-it permits sub-totaling, and totaling in'the rear accumulator and it prevents, sub-totaling and totaling in the front accumulator. When the total control lever is in its central or unoperated position, it allows sub-totaling, and totaling in the rear accumulator and it prevents sub-totaling and totaling in the front accumulator. In this central position, any totals taken from the rear accumulator are automatically run into the front accumulator and it is in this central position of the total control lever I40 that the total cam I44, on the paper carriage, is used to allow totaling in the mannerpreviously described. When the total control lever I48 is in its uppermost position, it prevents sub-totaling, and totaling in the rear accumulator and it allows sub-totaling, and totaling in the front accumulator. The control of the two accumulators by the total control lever I48, as has been previously stated, is old in this machine.

In summation, to take any total from either the front or rear accumulator, it is necessary to move the main total link 84 (Figs. 1 and 4) to the rear and, in order to do this, the cam 2 must be moved from beneath the roller 5 and the total shaft 8 must be unlatched by the nose I3I and the methods for unlatching the total shaft 8 at I3I are as follows:

(1) Depressing link I28 by means of the total cam I44 which is carried by the paper carriage.

(2) Manually moving the total control lever I40 to its lowermost position.

(3) Manually moving the total control lever I 40 to its uppermost position.

(4) In special instances, manually moving the lever I33 rearward.

While I have described what I consider to be a highly desirable embodiment of my invention, it is obvious that many changes in form could be made without departing from the spirit of my invention, and I, therefore, do not limit myself to the exact form herein shown and described, nor to anything less than the whole of my invention as hereinbefore set 'forth and as hereinafter claimed.

What I claim as new, and desire to secure by Letters Patent, is:

1. In a machine of the class described, the combination with operating mechanism of two separate accumulators, a'-totai link, means under control oi. said operating mechanism for actuating said link, a latch for latching said link against operation, means operable by said link to condition said operating mechanism for extracting a total from one oi said accumulators, means operable by said link to condition said operating mechanism for extracting a total from the other of said accumulators, means including a total control lever for enabling one of said conditioning means and concomitantly disabling the other conditioning means, and means operable by said total control lever for disabling said latch.

2. In a machine of the class described, the combination with operating mechanism of two separate accumulators, a total link, means under control of said operating mechanism tor actuating said link, a latch for latching ditioning means and concomitantly disabling the other conditioning means, a paper carriage movable to various positions, a cam on said paper carriage, means operable by said cam in a predetermined position of said carriage to disable said latch to print totals from one oi said accumulators in a columnar position on the paper, andmeans operable by said total control lever for disabling said latch independently of said cam, to print totals from the other accumulator.

3. In a key-controlled adding machine, the combination with a plurality of accumulators and operating and actuating means therefor for entering items and for taking totals, of a control lever settable to different positions to determine selectively the accumulator or accumulators to be actuated, a device spring urged to active position and acting when in that position to condition the operating means for the taking of a total, said device being restored to its inactive position by the return of the operating mechanism to its normal position, a blank stroke lock preventing the actuation of said device except in a cycle following a blank cycle of the machine, and a latch for restraining said device against movement to active position and released by an accumulatorselecting setting of said control lever; whereby said total-conditioning device tends to move to active position at every cycle of the machine but is restrained by said blank stroke lock in adding cycles and in the first blank stroke following an adding cycle and is released on a cycle following a blank cycle by the setting of said control lever to an accumulator-selecting position.

WALTER W. LANDSIEDEL. 

